Lord Rayleigh was an English physicist and mathematician who made significant contributions to the fields of physics and optics. His real name was John William Strutt, but he was commonly referred to as Lord Rayleigh due to his title as a British peer. Similarly, he was also known by other titles such as the Third Baron Rayleigh and the Baron Rayleigh, OM. Additionally, he was often associated with important scientific concepts, including Rayleigh scattering and Rayleigh waves. Overall, Lord Rayleigh was a prominent figure in the scientific community and is remembered for his impressive contributions to the study of light and wave phenomena.